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SMB3 Jelectro.jpg
The jellyfish-like Jelectro.
Species Origin Jellyfish
First Appearance Super Mario Bros. 3 (1988)
Latest Appearance Super Mario All-Stars Limited Edition (2010)
Related Species
Notable Members

Jelectros are glowing, electric jellyfish that stays in one place underwater in Super Mario Bros. 3. They appear in World 3-5 and World 7-4. They cannot be defeated by any means and will hurt Mario if touched. A large swarm in the middle of World 7-4 makes a hard time for swimming, especially since the screen moves automatically. Mario should try and swim slowly when surrounded by them.

Jelectros also make appearances in The Adventures of Super Mario Bros. 3. Here they are similar to their game appearances, except they have glowing red eyes and a more squared shape. They appear in episodes such as "Reptiles in the Rose Garden", where they can actually move, and "The Ugly Mermaid", where they stand still like they originally do in Super Mario Bros. 3.

In the Nintendo Adventure Book Leaping Lizards, Luigi spots some Jelectros through a window while exploring Iggy Koopa's secret underwater lab in Water Land. Three weeks later, some Jelectros appear in the swimming portion of the International Mushroom Games obstacle course. If the reader chooses Luigi to compete in the course, one of the Jelectros will shock and briefly stun him as soon as he enters the water.

Names in other languages[edit]

Language Name Meaning
Japanese しびれクラゲ Paralyzing Jellyfish
German Quallektro Electro-Jellyfish
Italian Elettromedusa Electrical Jellyfish